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Finding the Fourth Proportional to 3,312.64, 4,572 and 1,916.20

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Solution

The fourth proportional to 3,312.64, 4,572 and 1,916.20 is: 2,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,312.64 : 4,572 = 1,916.20 : x
  2. Step 2: Convert to fraction form
    3,312.64/4,572 = 1,916.20/x
  3. Step 3: Cross multiply
    3,312.64x = 4,572 × 1,916.20
  4. Step 4: Simplify right side
    3,312.64x = 8,760,866.40
  5. Step 5: Solve for x
    x = 8,760,866.40/3,312.64
  6. Step 6: Final answer
    x = 2,644.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.